DIAMOND HEAD -A-

Oil · District 01 · Lease #9729

Operator: STO OPERATING COMPANY

Fields: C.J.P. (REEF)

Cum Oil

18k BBL

Cum Gas

54 MCF

casinghead

Wells

3

Production

1993-01 — 2026-03

Peak Month

1998-04

Production History

Cum Oil: 18,240 BBL Cum Gas: 54 MCF

RRC production reported through Apr 2026 · recent months incomplete

Operator History (from monthly production reports)

2009-06 — 2026-07 CALK, ROGER D. 206 mo

2008-03 — 2009-05 STO OPERATING COMPANY 15 mo

2004-06 — 2008-02 HORIZON RIDGE OIL COMPANY 45 mo

1998-03 — 2004-05 PROPERTY DEVELOPMENT GROUP, INC. 75 mo

1993-01 — 1998-02 CHASE-MANN PETROLEUM INCORP. 62 mo

Wells (3)

WELL#	API	OPERATOR	PERMITS	DEPTH	LAST_ISSUED
4	42-013-32940	CALK, ROGER D.	1	2,500	1984-09-19
3	42-013-32733	CALK, ROGER D.	1	2,500	1984-05-18
2	42-013-32523	CALK, ROGER D.	1	2,500	1984-01-20